three objects A,B and C are initially at rest... Three objects A, B and C are in

Question

three objects A,B and C are initially at rest...

Three objects A, B and C are initially at rest on a level frictionless surface. Three constant forces of magnitudes FA, FB and Fc are acting on the objects in the same direction during the same time interval delta t= 1 s. After that time, the following observations are made: ? Object A has a mass of 1 kg and a speed of 1 m/s. ? Object B has a mass of 2 kg and a speed of 2 m/s. ? Object C has a mass of 3 kg and a speed of 3 m/s. Which one of the following statements is true? (A) FA = FB = Fc (B) FA = FB / 2 =Fc/ 3 (C) FA = 4 FB = 9 Fc (D) FA = FB /4 = Fc/9 (E) FA = root 2 FB = root 3 FB (F) none of the above / cannot be determined

Explanation / Answer

from, F = ma= m*(v/t)

we get, option (d)

Fa=Fb/4=Fc/9

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